Feliciano, J. G., Ildefonso, C., Alejandrino, R., & Lorico, L. (1987). A Systems analysis on Car Sales of APEX Motor Corporation. College of Engineering.
Lua i Stíl Chicago (17ú heag.)Feliciano, Jose Gerardo, Cristine Ildefonso, Rosamaria Alejandrino, agus Lernie Lorico. A Systems Analysis on Car Sales of APEX Motor Corporation. Diliman, Quezon City: College of Engineering, 1987.
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